Istikhara du'a

اللَّهُمَّ إِنِّي أَسْتَخِيرُكَ بِعِلْمِكَ وَأَسْتَقْدِرُكَ بِقُدْرَتِكَ وَأَسْأَلُكَ مِنْ فَضْلِكَ الْعَظِيمِ فَإِنَّكَ تَقْدِرُ وَلَا أَقْدِرُ وَتَعْلَمُ وَلَا أَعْلَمُ وَأَنْتَ عَلَّامُ الْغُيُوبِ اللَّهُمَّ إِنْ كُنْتَ تَعْلَمُ أَنَّ هَذَا الْأَمْرَ خَيْرٌ لِي فِي دِينِي وَمَعَاشِي وَعَاقِبَةِ أَمْرِي فَاقْدُرْهُ لِي وَيَسِّرْهُ لِي ثُمَّ بَارِكْ لِي فِيهِ وَإِنْ كُنْتَ تَعْلَمُ أَنَّ هَذَا الْأَمْرَ شَرٌّ لِي فِي دِينِي وَمَعَاشِي وَعَاقِبَةِ أَمْرِي فَاصْرِفْهُ عَنِّي وَاصْرِفْنِي عَنْهُ وَاقْدُرْ لِي الْخَيْرَ حَيْثُ كَانَ ثُمَّ أَرْضِنِي بِهِ

Allahumma inni astakhiruka bi'ilmika wa astaqdiruka biqudratika wa as'aluka min fadlikal-'adhim, fa'innaka taqdiru wa la aqdir, wa ta'lamu wa la a'lam, wa anta 'allamul-ghuyub. Allahumma in kunta ta'lamu anna hadhal-amra khayrun li fi dini wa ma'ashi wa 'aqibati amri faqdurhu li wa yassirhu li thumma barik li fih. Wa in kunta ta'lamu anna hadhal-amra sharrun li fi dini wa ma'ashi wa 'aqibati amri fasrifhu 'anni wasrifni 'anhu waqdur liyal-khayra haythu kana thumma ardini bih.

O Allah, verily I seek the better [of either choice] from You, by Your knowledge, and I seek ability from You, by Your power, and I ask You from Your immense bounty. For indeed You have power, and I am powerless; You have knowledge and I know not; You are the Knower of the unseen realms. O Allah, if You know that this matter is good for me with regard to my religion, my livelihood and the end of my affair then decree it for me, facilitate it for me, and grant me blessing in it. And if You know that this matter is not good for me with regard to my religion, my livelihood and the end of my affair then turn it away from me and me from it; and decree for me better than it, wherever it may be, and make me content with it.

Ṣaḥīḥ al-Bukhārī 1162, without the narrator's alternative wording ("or he said: in my present and later affairs")